Working hard to hide flags…
The first step in solving the challenge is running
exiftool on the image. Exiftool is a handy tool for viewing the metadata of an image. It can also be used for writing metadata.
This reveals an odd value in the
Using CyberChef, we can try to guess what encoding could have been used to create the string. Or we can use the
Magic function in CyberChef, which will try to guess the encoding for us.
Magic correctly detects that the string is base58 encoded, and shows us the decoded string:
Other useful resources: